Skydiver Felix Baumgartner breaking sound barrier for Red Bull Stratos. Talk about extreme. Whether people question whether skydiving is a sport or not, it certainly is challenging and requires strong technique.
That's why they call it a Spitfire! The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and many other Allied countries before, during and after World War II.